Stencil duplicating apparatus.



' No. 739,497. PATENTED SBPT.2'2,190:3..'

summon. DUPLIGATIIIG APPARATUS. APPLICATION FILED liEPT. 26 1902.

10 MODEL. I 2 SHEETS-511E211.

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No. 739,497. I PKTENTED SEPT. 22,1903.

A. D. KLABBR. STENCIL DUPLIOATINGAPPARATUS.

LPiLIdATION FILED SEPT. 25, 1902.

H0 MODEL. 2 SHEETS-SHEET 2.

a .l' V///////////////////////////////////////////////////////////% wlfNEssEs: v INVENTOR Z Z I 1am y a ATTORNEY A UNITED STATES v Patented. September 22, 1903.

PATENT 7 OF ICE.

AUGUSTUS DAVID KLABE R, OF LONDON, ENGLAND, ASSIGNOR TO A. B. DICK COMPANY, OF CHIOAGO,ILLINOIS, A CORPORATION OF ILLINOIS.

STENCIL DUPLICATING APPARATUS.

SPECIFICATION forming part of Letters Patent Iva 739,497, dated September 22, 1903. v Application filed September 25, 1902. erial No. 124,752. (No model- To all whom it may concern.-

Be it known that I, AUGUSTUS DAVID KLA-j BER, a subject of the King of Great Britain and Ireland, residing at 327 High Holborn, London, England, have invented certain new and useful Improvements in Stencil Duplicating Apparatus, (for which I have made application for Letters Patent in Great Britain,

No. 19,444, dated September 4, 1902,) of

which the following is a specification.

This invention relates to the inking arrangements of stencil duplicating or like printing apparatus, and is especially applicable to the type of machine known as the rotary neostylef? In the machines of the latter kinda stencil primarily apply the ink to the inking-pad by hand before the stencil is placed in position.

Theink is usually applied by means of a brush. Such an operation is not only slow and requires great care to evenly distribute the ink, but is inconvenienn 'owing to the great liability to accidental spluttering of the ink, which is necessarily of an indelible and" mobile quality.

The object of the present invention is to provide means whereby the inking of the pad may be accomplished automatically that is to say, by the operation of the machine itselfwithout requiring any handling of the ink or ink-brush by the operator.

The invention, essentially consists in providing the inking-roller of the machine with a an automatic supplying device and in so mounting the roller that it may be adapted to rotate in contact with the platen-cylinder when it is desired to apply ink to the same, but moved and held out of contact from the cylinder during the normal working of the machine after sufficient ink has been applied.

In the accompanying drawings, Figure 1 is erative. v plying device consisting of an ink-trough w a side sectional elevation of a rotary -duplieating apparatus with one form of the invention applied thereto. Figs. 2 and 3 are respectively side sectional elevation and end View of a rotary duplicating apparatus with another form of the invention applied thereto. Fig. etshows a detail connected therewith.

In carrying out the invention according to one form as applied to a rotary duplicating apparatus and as illustrated in Fig. l of the drawings the roller 01. is mounted in bearings and caused to roll in contact with the perforated platen-cylinderb in the usual manner,

buta catch '0 is attached to the usual side levers or supports d for the roller, by means of which the roller may when desired be retained "out of contact with the cylinder even when the machine is working. This catch is' provided because it is found that it is not necessary to continuouslyink the pad, but that a few revolutions of the machine with the roller in contact supplies sufficient ink for a considerable time. The catch may be convenientlyformed by means of a cross baror rod of wire attached atits ends to the two side levers dand bentat its middle portion e to form a handle or hook-like catch, which can be forced over the main shaft f of the machine when it is desired to render the roller inop- The roller is fitted with an ink-supor duct carried by the side levers d, which support the roller. The trough is preferablymade of sheet metal of such form as to par,- tially inclose the roller. It is also provided on one side with a wiper y, which may consist simply of a plate screwed to the trough, as shown, or otherwise secured, so as to present an edge in contact with the roller to pre vent an excessive quantity of ink being applied.

In carrying out the invention according to another form, as illustrated in Figs. 2 to t, the trough or duct is dispensed with and the roller adapted to act'as the ink-reservoir.

The roller it, which is hollow, is preferably made of metal suitab1y'weighted,so that when inoperative it is always retained by gravity in the same position. About one-third of the periphery of the roller is perforated, and the whole surface of the periphery is enveloped in a covering g of felt or like absorbent material, perforated in such manner that the holes therein coincide with the holes in the periphery of the roller. A final covering it ofgauze orlike thin fabric is then placed over the felt. A feeding inlet or orifice for ink is provided in the roller, preferably on the periphery, at a point which is normally kept at the top by the heavier or weighted part 2' of the roller. This orifice is fitted with an inwardly-projectinglipj or other device to prevent accidental escape of ink while the roller is revolving. A plug or other stopper may be used, if desired.

When it is desired to ink the pad of the machine, the catch a is released, allowing the roller a, which has been previously filled with ink, to move into contact with the cylinder b, a few revolutions of which will then be found quite sufficient to effect an adequate inking of the pad, when the roller may be again drawn back and retained by its catch 0, the weighted portion 2 of the roller automatically causing the inlet-orifice and perforated portion of the periphery toregain' the uppermost position to prevent leakage of ink.

To regulate the flow of ink, the roller a may be made of two perforated cylinders 75 [11, as shown, one cylinder being inclosed within and snugly fitting the other, so that by slightly rotating one cylinder relatively to the other the effective area of the perforations may be adjusted from zero toa maximum, when they coincide exactly in the two cylinders. To prevent evaporation of the ink and consequent clogging of the perforations When the roller is inoperative, the perforated portion of the roller may be provided with a removable cap or cover Z, Fig. 4, preferably lined with felt or some absorbent material.

It will be understood that the method of mounting or operating the roller may be varied to suit the type of machine to which it is applied.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, 1's-- 1. In a rotary duplicator or like apparatus means for automatically applying ink to the platen-cylinder comprising an ink-roller pro- Vided with an ink supplying device and adapted to rotate in contact with the platencylinder when required for the inking operation but adapted to be held out of contact therewith during the normal Working of the machine, substantially as hereinbefore set forth.

2. In a rotary duplicator or like apparatus means for automatically applying ink to the platen-cylinder comprising an inking-roller provided with an ink duct or trough and a wiper, and adapted to rotate in contact with the platen-cylinder during the inking operation but adapted to be held out of contact therewith during the normal working of the machine, substantially as hereinbefore set forth.

3. In a rotary duplicator or like apparatus provided with an inking-roller fitted with an ink-supplying device means for holding the same out of contact with the platen-cylinder comprising a catch adapted to engage the main shaft or framework of the machine while the roller is inoperative, substantially as hereinbefore set forth.

In Witness whereof I have hereunto set my hand in presence of two Witnesses.

AUGUSTUS DAVID KLABER.

Witnesses:

EDITH ETHEL WRIGHT, ALBERT E. BARKER. 

